Great Plains 3N-3020 Assembly Instructions - Manual (Page 5)

4/8/2004 120-301M
Great Plains Mfg., Inc.
5 Installation Instructions
Refer to Figure 8
8. Slide the first lock collar installed on the pivot
shaft against the bearing and tighten. Slide
the 19 tooth sprocket installed on the pivot
shaft against the bearing. Slide the second
lock collar installed on the pivot shaft against
the sprocket and tighten.
9. Install chain idler and chain.
Note: In order for the motor to have the correct ra-
tio to the seed meters you must set the range and
the transmission sprockets.
Refer to Figure 9
10. For Precision drill:
Set the range sprockets with a 30 tooth
sprocket for the driver, and a 30 tooth sprock-
et for the driven, on both sides of the unit. Re-
install chains and tighten the idlers.
11. For Feeder Cup drill:
Set the range sprockets to drive type 4 on
both sides of the unit. Reinstall chains and
tighten the idlers.
Refer to Figure 10
12. Set the transmission sprockets with a 28 tooth
sprocket for the driver, and a 25 tooth sprock-
et for the driven, on both sides of the unit.
Note: Be sure to set both the left-hand and right-
hand range and transmission sprockets. Once
they are set they will not need to be changed.
Note: For Feeder Cup drill there is no transmis-
sion sprocket change.
Idler
Figure 8
Chain and Chain Idler
20039
Figure 9
Range Sprockets
20040
Figure 10
Transmission Sprockets
20041